CN116648314A - Reaction device for reinforcing fiber recovery and method for producing regenerated reinforcing fiber - Google Patents
Reaction device for reinforcing fiber recovery and method for producing regenerated reinforcing fiber Download PDFInfo
- Publication number
- CN116648314A CN116648314A CN202180079668.8A CN202180079668A CN116648314A CN 116648314 A CN116648314 A CN 116648314A CN 202180079668 A CN202180079668 A CN 202180079668A CN 116648314 A CN116648314 A CN 116648314A
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- Prior art keywords
- fiber
- resin material
- reinforced resin
- reinforcing fiber
- reinforcing
- Prior art date
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- 239000012783 reinforcing fiber Substances 0.000 title claims abstract description 157
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 117
- 238000011084 recovery Methods 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 179
- 239000011347 resin Substances 0.000 claims abstract description 179
- 239000000463 material Substances 0.000 claims abstract description 136
- 238000003825 pressing Methods 0.000 claims abstract description 79
- 239000002904 solvent Substances 0.000 claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 95
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
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- 238000007906 compression Methods 0.000 claims description 4
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- 239000000126 substance Substances 0.000 description 20
- 238000004140 cleaning Methods 0.000 description 13
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- 239000011151 fibre-reinforced plastic Substances 0.000 description 12
- 238000003756 stirring Methods 0.000 description 10
- 230000002378 acidificating effect Effects 0.000 description 8
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 8
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- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
- B29B17/0047—Compacting complete waste articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/75—Plastic waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0293—Dissolving the materials in gases or liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0436—Immersion baths
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The application provides a reaction device for reinforcing fiber recovery and a method for manufacturing regenerated reinforcing fibers, which can maintain the shape and orientation of reinforcing fiber bundles when separating reinforcing fibers from a fiber-reinforced resin material in a solvent method. A reaction device for reinforcing fiber recovery, which is used for recovering reinforcing fibers from a fiber reinforced resin material by a solvent method, comprises: a reaction tank for accommodating the fiber reinforced resin material and the solvent; and a fixing mechanism including a pressing member capable of pressing the fiber-reinforced resin material, and capable of fixing the fiber-reinforced resin material accommodated therein by pressing by the pressing member.
Description
Cross Reference to Related Applications
The present application claims japanese patent application filed in japan based on 12 months of 2020: the priority of Japanese patent application 2020-200195 is incorporated by reference in its entirety.
Technical Field
The present application relates to a reaction device for reinforcing fiber recovery and a method for producing regenerated reinforcing fibers.
Background
Fiber reinforced plastics (Fiber Reinforced Plastics; FRP) using fibers such as glass fibers as reinforcing materials are lightweight, high-strength and high-elasticity materials, and are widely used for parts of small ships, automobiles, railway vehicles, and the like. For the purpose of further weight reduction, strength enhancement and elasticity enhancement, carbon fiber reinforced plastics (Carbon Fiber Reinforced Plastics; CFRP) using carbon fibers as reinforcing materials have been developed and used for parts of aircraft, automobiles and the like.
In recent years, the amount of waste fiber reinforced plastics used tends to increase, and development of recycling technology thereof has been advanced. As a method for recovering the reinforcing fibers of the fiber reinforced plastic, there are mainly a thermal decomposition method for removing and recovering the reinforcing fibers by thermally decomposing a resin component by a heat treatment, and a solvent method for removing and recovering the reinforcing fibers by dissolving the resin component by a solvent. Among them, the solvent method is advantageous from the viewpoint of recycling of resources because the resin component is easily recovered.
As the solvent method, for example, a method proposed in patent document 1 is cited. Patent document 1 discloses a process for obtaining a cut piece by cutting a composite material in a block form containing an inorganic material and an organic material, and a method for obtaining a broken piece by breaking the cut piece. In addition, in this document, as a method for separating an inorganic material from an organic material in broken pieces, a method for decomposing an organic material using a treatment liquid capable of decomposing an organic material contained in broken pieces and recovering an inorganic material is proposed.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2020-11482
Disclosure of Invention
The invention aims to solve the technical problems
However, in the solvent method, in order to effectively dissolve the resin component in the fiber-reinforced resin material, it is necessary to agitate the mixed liquid of the solvent and the fiber-reinforced resin material. When the mixed liquid is stirred, it is difficult to maintain the shape and orientation of the fiber bundles of the reinforcing fibers present in the fiber-reinforced resin material. If the shape and orientation of the fiber bundles of the reinforcing fibers cannot be maintained, the fiber directions of the recovered reinforcing fibers are not aligned, and the use of the recovered reinforcing fibers is limited.
Accordingly, an object of the present invention is to provide a reaction device for reinforcing fiber recovery and a method for producing regenerated reinforcing fibers, which can maintain the shape and orientation of reinforcing fibers when separating reinforcing fibers from a fiber-reinforced resin material in a solvent method.
Technical unit for solving technical problems
The inventors of the present invention have found that, when how to maintain the shape and orientation of the reinforcing fibers in the fiber-reinforced resin material when using the solvent method, if the fiber-reinforced resin material itself can be fixed at a constant position, the shape and orientation of the reinforcing fibers can be maintained. Further, based on the above findings, the inventors of the present invention have further conducted intensive studies to complete the present invention.
The gist of the present invention is as follows.
(1) A reaction device for reinforcing fiber recovery, which is used for recovering reinforcing fibers from a fiber reinforced resin material by a solvent method, comprises:
a reaction tank for accommodating the fiber reinforced resin material and the solvent; and
the fixing mechanism comprises a pressing component capable of pressing the fiber reinforced resin material, and the fiber reinforced resin material accommodated in the fixing mechanism can be fixed by pressing the pressing component.
(2) The reaction device for reinforcing fiber recovery according to (1), wherein the pressing member has a plate shape.
(3) The reaction device for reinforcing fiber recovery according to (1) or (2), wherein the pressing member has a pressing surface that presses the fiber-reinforced resin material, and is capable of reciprocating in a direction perpendicular to the pressing surface.
(4) The reaction device for reinforcing fiber recovery according to any one of (1) to (3), wherein the fixing mechanism has a support member that supports the fiber-reinforced resin material from a side opposite to the pressing member.
(5) The reaction device for reinforcing fiber recovery according to (4), wherein the support member has a plate shape.
(6) The reaction device for reinforcing fiber recovery according to (4) or (5), wherein the support member is reciprocable in a direction toward the pressing member.
(7) The reaction device for reinforcing fiber recovery according to any one of (4) to (6), further comprising an elastic member for supporting the supporting member.
(8) The reaction device for reinforcing fiber recovery according to item (7), wherein the elastic member is a compression coil spring.
(9) The reaction device for reinforcing fiber recovery according to any one of (4) to (8), further comprising a regulating member for regulating a movement position of the supporting member.
(10) The reaction device for reinforcing fiber recovery according to any one of (1) to (9), wherein the reaction tank has an opening for feeding the fiber-reinforced resin material, and is configured to be tiltable so that the opening is tilted downward.
(11) The reaction device for recovering a reinforcing fiber according to any one of (1) to (10), wherein the reinforcing fiber is a carbon fiber.
(12) A method for producing a regenerated reinforcing fiber, comprising the steps of treating a fiber-reinforced resin material comprising reinforcing fibers and a resin component with a treatment liquid comprising a solvent using the reaction device for reinforcing fiber recovery of any one of (1) to (11) and dissolving at least a part of the resin component in the treatment liquid,
In the step, the fiber-reinforced resin material is treated with the treatment liquid in a state of being fixed by the fixing means.
(13) A method for producing regenerated reinforcing fibers, comprising the steps of treating a fiber-reinforced resin material comprising reinforcing fibers and a resin component with a treatment liquid comprising a solvent, and dissolving at least a part of the resin component in the treatment liquid,
in the step, the fiber-reinforced resin material is treated with the treatment liquid in a state of being fixed by pressing.
(14) The method for producing a regenerated reinforcing fiber according to (12) or (13), wherein in the step, the solvent is stirred while the fiber-reinforced resin material is fixed.
Effects of the invention
According to the above configuration, it is possible to provide a reaction device for reinforcing fiber recovery and a method for producing regenerated reinforcing fibers, which can maintain the shape and orientation of the reinforcing fibers when separating the reinforcing fibers from the fiber-reinforced resin material in the solvent method.
Drawings
Fig. 1 is a perspective view schematically showing a reaction apparatus for reinforcing fiber recovery according to an embodiment of the present invention.
Fig. 2 is a partial cross-sectional view of the reaction device for reinforcing fiber recovery shown in fig. 1.
Fig. 3 is a partial cross-sectional view for explaining the operation of the reaction device for reinforcing fiber recovery shown in fig. 1.
Fig. 4 is a partial cross-sectional view for explaining the operation of the reaction device for reinforcing fiber recovery shown in fig. 1.
Fig. 5 is a partial cross-sectional view for explaining the operation of the reaction device for reinforcing fiber recovery shown in fig. 1.
Fig. 6 is a partial cross-sectional view for explaining the operation of the reaction device for reinforcing fiber recovery shown in fig. 1.
Fig. 7 is a perspective view schematically showing a reaction apparatus for reinforcing fiber recovery according to another embodiment of the present invention.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, for convenience of explanation, unnecessary parts are appropriately omitted. In addition, the dimensions of the illustrated components are appropriately enlarged and reduced for convenience of explanation, and are not intended to represent actual sizes of the components.
Fig. 1 is a perspective view schematically showing a reaction apparatus for reinforcing fiber recovery according to an embodiment of the present invention, and fig. 2 is a partial cross-sectional view of the reaction apparatus for reinforcing fiber recovery shown in fig. 1.
The reaction device 1 for reinforcing fiber recovery shown in fig. 1 is used for recovering reinforcing fibers from a fiber-reinforced resin material by a solvent method. The fiber-reinforced resin material is a resin material reinforced by embedding reinforcing fibers such as carbon fibers. Further, the fiber-reinforced resin material will be described in detail later.
The reaction device 1 for reinforcing fiber recovery includes a reaction tank 10, a cover 20, a fixing mechanism 30, and a support table 40. The respective configurations of the reaction device 1 for reinforcing fiber recovery will be described in detail in order.
The reaction tank 10 is a container capable of accommodating the fiber reinforced resin material and the solvent. As shown in fig. 2, the reaction tank 10 includes a reaction tank body 11, a temperature adjustment sleeve (socket) 13, a drain port 15, a valve 17, and a flange 19.
The reaction vessel body 11 is a bottomed tubular vessel having a bottom 113 at a lower portion and an opening 115 at an upper portion. The reaction tank body 11 has a housing space 111 in which the fiber-reinforced resin material and the solvent can be housed. The fiber-reinforced resin material and the material necessary for the reaction such as the solvent are accommodated in the accommodation space 111 of the reaction vessel 11 through the opening 115.
The temperature adjustment sleeve 13 is disposed so as to surround the outer peripheral side surface of the reaction tank body 11. The temperature adjustment sleeve 13 can heat and/or cool the content contained in the reaction tank body 11 and adjust the temperature of the content. The temperature control jacket 13 is configured to control the temperature of the content by heat exchange of a heat medium such as water through the inside thereof. Alternatively, the temperature adjustment sleeve 13 may be a heating unit such as an electric heater.
The liquid discharge port 15 is provided at the bottom 113 of the reaction tank body 11, and can discharge the liquid such as the processing liquid existing in the housing space 111 of the reaction tank body 11 through the liquid discharge port 15. A valve 17 is attached to the middle of the liquid discharge port 15, and the opening and closing of the liquid discharge port 15 can be controlled by operating the valve 17.
The flange 19 is a disk-shaped member protruding from an outer peripheral edge portion in the vicinity of the opening 115 of the reaction vessel body 11. The flange 19 is in contact with a flange 27 of a lid 20 to be described later during reaction, and prevents leakage of the contents in the reaction tank body 11 together with the flange 27. The lid 20 can be fixed to the reaction tank body 11 by fixing the flange 19 and the flange 27.
The lid 20 is a removable lid for opening and closing the reaction tank 10, and can be configured to cover the opening 115 to close the reaction tank 10. The cap 20 includes a cap body 21, a liquid inlet 23, an air outlet 25, and a flange 27.
The cover body 21 is a main part of the cover 20 in the shape of a bowl upside down. A through hole is provided in the center of the cover body 21, and a control member 33 of a fixing mechanism 30, which will be described later, is penetrated. In addition, a liquid inlet 23 and an air outlet 25 are provided in the cap body 21.
The liquid inlet 23 is a pipe for injecting a treatment liquid such as a solvent. The exhaust port 25 is a pipe for removing surplus gas such as steam generated during use of the reaction tank 10. In the present embodiment, the liquid inlet 23 and the gas outlet 25 are provided on the upper surface of the lid body 21, but the present invention is not limited to the illustrated embodiment, and may be installed at any position of the lid body 21 or any position of the reaction tank 10. The plurality of the liquid inlet 23 and the plurality of the air outlet 25 may be provided according to the purpose of use.
The flange 27 is a disk-shaped member protruding from the outer peripheral edge portion of the lid body 21 on the side of the opening 115 of the reaction vessel 10. The flange 27 abuts against the flange 19 of the reaction vessel 10 during the reaction, and prevents the leakage of the contents in the reaction vessel body 11 together with the flange 19.
The fixing mechanism 30 is fixed by pressing the fiber reinforced resin material when the reaction device 1 for reinforcing fiber recovery is used. The fixing mechanism 30 includes a pressing member 31, a control member 33, a support member 35, an elastic member 37, and a restricting member 39.
The pressing member 31 is disposed in the housing space 111 of the reaction tank 10 when the reaction device 1 for reinforcing fiber recovery is used. The pressing member 31 has a plate shape and has a pressing surface 311 for pressing the fiber reinforced resin material. In the present embodiment, the pressing member 31 is disposed such that the pressing surface 311 is horizontal and substantially parallel to the support surface 351 of the support member 35. The pressing member 31 having the above-described structure can control the position by the control member 33, and presses the fiber reinforced resin material by the pressing surface 311.
The area of the pressing surface 311 of the pressing member 31 is not particularly limited, but may be, for example, 10% to 90%, preferably 30% to 50%, of the area of the cross section parallel to the pressing surface 311 in the housing space 111. Thus, when the fiber-reinforced resin material is fixed by the pressing member 31, the flow of the treatment liquid in the storage space 111 is facilitated, and the penetration of the treatment liquid into the fiber-reinforced resin material is facilitated.
The control member 33 is a rod-shaped member, and one end thereof is connected to the pressing member 31. The other end side of the control member 33 penetrates the cover body 21 and is connected to a driving device not shown. Further, the pressing member 31 can be moved in the direction perpendicular to the pressing surface 311 by moving the control member 33 in the direction perpendicular to the pressing surface 311 (i.e., up and down in the drawing).
The support member 35 is disposed below the control member 33 in the accommodation space 111. The support member 35 has a plate shape, and one support surface 351 is disposed so as to face the pressing surface 311. When the pressing member 31 presses the fiber reinforced resin material, the support member 35 supports the fiber reinforced resin material on the support surface 351 from the opposite side to the pressing member 31. Thus, when the fiber-reinforced resin material is pressed by the pressing member 31, the fiber-reinforced resin material can be fixed between the pressing member 31 and the support member 35.
The area of the support surface 351 of the support member 35 is not particularly limited, but may be, for example, 10% to 90%, preferably 30% to 50%, of the area of the cross section parallel to the support surface 351 in the storage space 111. Thus, even when the fiber reinforced resin material is fixed by the support member 35, the flow of the treatment liquid in the storage space 111 is easy, and the penetration of the treatment liquid into the fiber reinforced resin material is easy.
The elastic member 37 is disposed between the support member 35 and the bottom 113 of the reaction chamber body 11, and supports the support member 35. The elastic member 37 is a so-called compression coil spring. By supporting the support member 35 using such an elastic member 37, the support member 35 can move downward in accordance with the pressing force of the pressing member 31. As a result, excessive pressure is prevented from being applied to the fiber-reinforced resin material, and damage to the reinforcing fibers in the fiber-reinforced resin material is suppressed. In addition, when the pressing member 31 reciprocates, the supporting member 35 can reciprocate accordingly due to the presence of the elastic member 37. The pressing member 31 and the supporting member 35 reciprocate, whereby the processing liquid in the storage space 111 is stirred.
The regulating member 39 has a regulating plate 391 and a connecting member for connecting the regulating plate 391 to the bottom 113 of the reaction vessel body 11. The regulating plate 391 is fixed substantially parallel to the support member 35 at a position closer to the bottom 113 side of the reaction vessel body 11 than the support member 35. When the support member 35 moves downward, the support member 35 abuts against the restricting plate 391 of the restricting member 39 to restrict the downward movement position of the support member 35. That is, the restriction member 39 determines a position where the support member 35 can move downward. By providing such a restricting member 39, the fixing mechanism 30 can move the pressing member 31 downward, and squeeze the fiber reinforced resin material between the pressing member 31 and the supporting member 35.
The support table 40 shown in FIG. 1 is a table for supporting the reaction vessel 10. The support table 40 has a support table body 41 and a rotation shaft 43. The support table body 41 is a column erected from the ground. The rotation shaft 43 is rotatably connected to the upper side of the support table body 41 and the reaction tank 10. This can incline the reaction tank 10. Thus, the opening 115 of the reaction tank 10 can be inclined downward, and the fiber-reinforced resin material can be easily put into the reaction tank or the reinforcing fibers can be easily taken out after the reaction.
As described above, in the reaction device 1 for reinforcing fiber recovery of the present embodiment, the fiber-reinforced resin material can be pressed and fixed by the fixing mechanism 30, and the reaction can be performed. Thus, when the fiber-reinforced resin material is treated with the treatment liquid containing the solvent, the shape of the reinforcing fibers in the fiber-reinforced resin material becomes difficult to deform. In particular, since the reinforcing fibers are fixed by the fixing mechanism 30 after the resin component in the fiber-reinforced resin material is dissolved and the reinforcing fibers are exposed during the treatment, the reinforcing fibers are less likely to be entangled. In this way, the shape and fiber direction of the obtained regenerated reinforcing fibers can be maintained, for example, the fiber direction of the obtained regenerated reinforcing fibers can be maintained in one direction, and physical properties, such as physical strength, of the fiber-reinforced resin material produced using the regenerated reinforcing fibers can be improved.
In addition, since the reinforcing fibers are not easily entangled with each other after the resin component in the fiber-reinforced resin material is dissolved and the reinforcing fiber bundles are exposed during the treatment, the treating liquid can uniformly infiltrate the reinforcing fibers in the fiber-reinforced resin material, and the dissolution reaction of the resin component can be uniformly performed.
In the reaction device 1 for reinforcing fiber recovery of the present embodiment, the fiber-reinforced resin material can be pressed and fixed by the fixing mechanism 30, and the reaction can be performed. Accordingly, a wide variety of fiber reinforced resin materials can be handled regardless of size and shape. For example, a fiber-reinforced resin material having a very small cut length and a large prepreg can be treated to recover the regenerated reinforcing fibers.
The reaction device 1 for recovering reinforcing fibers according to the present embodiment may be used to clean and deliquorate the recovered regenerated reinforcing fibers. Therefore, a plurality of steps for recovering regenerated reinforcing fibers can be performed using the reinforcing fiber recovery reaction apparatus 1 without changing the apparatus.
Further, in the reaction device 1 for reinforcing fiber recovery of the present embodiment, the pressing member 31 is configured to be capable of reciprocating, whereby the stirring of the treatment liquid can be performed in association with the reciprocating of the pressing member 31. Here, in the present embodiment, the support member 35 can reciprocate with the reciprocation of the pressing member 31, and therefore the fiber-reinforced resin material itself is fixed and can be stirred.
2. Method for producing regenerated reinforcing fiber
Next, a method for producing a regenerated reinforcing fiber according to an embodiment of the present invention will be described. The method for producing a regenerated reinforcing fiber according to the present invention includes a dissolving step in which a fiber-reinforced resin material including a reinforcing fiber and a resin component is treated with a treatment liquid including a solvent, and at least a part of the resin component is dissolved in the treatment liquid, and in the dissolving step, the fiber-reinforced resin material is treated with the treatment liquid in a state in which the fiber-reinforced resin material is pressed and fixed.
The method for producing a regenerated reinforcing fiber according to the present invention may be carried out by any apparatus, but in the following description, an example using the reaction apparatus for recovering a reinforcing fiber according to the present embodiment will be representatively described in detail. Fig. 3 to 6 are partial cross-sectional views for explaining an example of the operation of the reaction device for reinforcing fiber recovery in the method for producing a regenerated reinforcing fiber according to the present embodiment. The respective steps of the method for producing a regenerated reinforcing fiber according to the present embodiment will be described in order.
2.1 preparation step
First, before the dissolving process, the fiber-reinforced resin material 100 provided for the dissolving process is prepared. As described above, the fiber-reinforced resin material is a resin material reinforced by embedding reinforcing fibers. The Fiber-reinforced resin material 100 is not particularly limited, and examples thereof include carbon Fiber-reinforced plastics (Carbon Fiber Reinforced Plastics; CFRP), glass Fiber-reinforced plastics (Glass Fiber Reinforced Plastics; GFRP), glass long Fiber felt-reinforced thermoplastics (Glass-Mat reinforced Thermoplastics; GMT), aromatic polyamide Fiber-reinforced plastics (Aramid-Fiber-Reinforced Plastics; AFRP), kevlar Fiber-reinforced plastics (Kevlar Fiber Reinforced Plastics; KFRP), dinima Fiber-reinforced plastics (Dyneema Fiber-Reinforced Plastics; DFRP), basalt Fiber-reinforced plastics, boron Fiber-reinforced plastics, and prepregs thereof. Among the above materials, carbon fiber reinforced plastics are used in relatively large amounts or consume a large amount of energy in the production of carbon fibers, and therefore, it is preferable to recover and reuse carbon fibers in the used carbon fiber reinforced plastics and/or prepregs thereof.
The reinforcing fibers in the fiber-reinforced resin material 100 may be in the form of bundles (tows) of a plurality of reinforcing fibers aligned in one direction, or in the form of a woven or nonwoven fabric in which bundles of reinforcing fibers are used for warp yarns and weft yarns, or may be in the form of individual reinforcing fibers arranged at random positions and in random directions. In particular, when a fiber bundle or a woven reinforcing fiber is taken out by a solvent method, penetration of a treatment liquid is difficult, and the shape and orientation of the reinforcing fiber tend to collapse. Therefore, the method of the present embodiment is suitable for recovering reinforcing fibers from a fiber-reinforced resin material containing fiber bundles or textile-like reinforcing fibers.
In this case, for example, broken fibers of a cut fiber bundle, a sheet-like woven fabric, or the like can be used.
The resin component contained in the fiber-reinforced resin material 100 is not particularly limited, and may be, for example, any of a thermosetting resin and a thermoplastic resin. The thermosetting resin may be uncured or cured.
The thermosetting resin is not particularly limited, but examples thereof include epoxy resins, unsaturated polyester resins, vinyl ester resins, phenolic resins, cyanate resins, polyimide resins, melamine resins, polyurethane resins, polycarbonate resins, polyacetal resins, and the like, and one or a combination of two or more of them may be used alone.
The thermoplastic resin is not particularly limited, but examples thereof include polyamide, polyolefin, polyester, polycarbonate, acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyether ketone, polyphenylene sulfide, and the like, and one or a combination of two or more thereof may be used for the resin component.
The fiber-reinforced resin material 100 may be plate-like (sheet) itself or may be cut into pieces. In particular, the method of the present embodiment can be suitably applied to a plate-shaped fiber-reinforced resin material 100 in which it has been difficult to collect reinforcing fibers.
The size of the fiber-reinforced resin material 100 is not particularly limited as long as it can be accommodated in the accommodating space 111 of the reaction tank 10. However, when considering the direction of retaining the reinforcing fibers in the fiber-reinforced resin material 100, the length of one sheet of the fiber-reinforced resin material 100 may be, for example, 100mm or more, preferably 500mm or more and 3000mm or less. More specifically, for example, a fiber-reinforced resin material sheet having a width of 1000mm×500mm and a laminated thickness of about 300mm may be used as the fiber-reinforced resin material 100.
2.2 dissolution step
In this step, the prepared fiber-reinforced resin material 100 is treated with the treatment liquid 200 containing a solvent, and at least a part of the resin component is dissolved in the treatment liquid 200. Specifically, in the present embodiment, as shown in fig. 3 and 4, the fiber-reinforced resin material 100 and the treatment liquid 200 are put into the housing space 111 of the reaction tank 10 of the reaction device 1 for reinforcing fiber recovery, and are treated in the reaction tank 10. Hereinafter, the treatment solution 200 will be described first, and specific steps will be described later.
(i) Treatment liquid
The treatment liquid 200 in this step contains at least a solvent, and dissolves at least a part of the resin component in the fiber-reinforced resin material 100. Here, in the present specification, "dissolving the resin component" includes not only the case where the resin component itself is directly dissolved in the processing liquid 200 but also the case where the resin component is decomposed to generate a reactant and the product is dissolved in the processing liquid 200.
The solvent is a main component of the treatment liquid 200. The solvent is not particularly limited as long as it can dissolve the resin component of the fiber-reinforced resin material 100 or the reactant in the present step, and for example, water and/or various organic solvents can be used.
The organic solvent is not particularly limited, but examples thereof include alcohol solvents, ether solvents, ester solvents, ketone solvents, amide solvents, aromatic hydrocarbons, halogenated aliphatic hydrocarbons, and the like, and one or two or more of them may be used alone or in combination.
Examples of the alcohol solvent include aliphatic alcohol solvents, aromatic alcohol solvents, glycol solvents, and other polyols such as glycerin.
Examples of the aliphatic alcohols include acyclic aliphatic alcohols such as 1-butanol, 2-methyl-1-propanol, 2-methyl-2-propanol, 1-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 2-methyl-2-butanol, 3-methyl-1-butanol, 3-methyl-2-butanol, 2-dimethyl-1-propanol, 1-hexanol, 2-hexanol, 3-hexanol, 2-ethylhexanol, 2-methyl-1-pentanol, 4-methyl-2-pentanol, 2-ethyl-1-butanol, 1-heptanol, 2-heptanol, 3-heptanol, dodecanol, methanol, ethanol, and the like, and alicyclic alcohols such as cyclohexanol, 1-methylcyclohexanol, 2-methylcyclohexanol, 3-methylcyclohexanol, and 4-methylcyclohexanol.
Examples of the aromatic alcohol solvent include phenol, cresol, benzyl alcohol, and phenoxyethanol.
Examples of the glycol-based solvent include ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol, polyethylene glycol (molecular weight 200 to 400), 1, 2-propanediol, 1, 3-propanediol, 1, 2-butanediol, 1, 3-butanediol, 1, 4-butanediol, 2, 3-butanediol, 1, 5-pentanediol, dipropylene glycol, and the like.
Examples of the ether solvent include aliphatic ethers such as dimethyl ether, diethyl ether, ethyl methyl ether, dipropyl ether, diisopropyl ether, dibutyl ether, and dihexyl ether, cyclic ethers such as 1, 3-dioxolane, 1, 4-dioxane, tetrahydrofuran, and furan, and aromatic-containing ethers such as anisole, phenetole, diphenyl ether, and benzofuran.
Examples of the ester solvent include methyl formate, ethyl formate, propyl formate, butyl formate, isobutyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, amyl acetate, isoamyl acetate, 3-methoxybutyl acetate, 2-ethylbutyl acetate, 2-ethylhexyl acetate, cyclohexyl acetate, benzyl acetate, methyl propionate, ethyl propionate, butyl propionate, isoamyl propionate, methyl lactate, ethyl lactate, butyl lactate, methyl butyrate, ethyl butyrate, butyl butyrate, isoamyl butyrate, isobutyl isobutyrate, ethyl isovalerate, isoamyl isovalerate, methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, gamma-butyrolactone, diethyl oxalate, dibutyl oxalate, diethyl malonate, methyl salicylate, ethylene glycol diacetate, tributyl borate, trimethyl phosphate, triethyl phosphate, and the like.
Examples of the ketone solvent include acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, 2-hexanone, methyl isobutyl ketone, 2-heptanone, 4-heptanone, diisobutyl ketone, cyclohexanone, methylcyclohexanone, isophorone, acetylacetone, acetophenone, diethyl ketone, diacetone alcohol, and the like.
Examples of the amide-based solvent include formamide, N-methylformamide, N-dimethylformamide, N-diethylformamide, acetamide, N-methylacetamide, N-dimethylacetamide, 2-pyrrolidone, N-methyl-2-pyrrolidone, caprolactam, and carbamate.
Examples of the aromatic hydrocarbon include benzene, toluene, and xylene.
Examples of the halogenated aromatic hydrocarbon include o-chlorophenol and o-dichlorobenzene.
Examples of the halogenated aliphatic hydrocarbon include chloroform and methylene chloride.
The content of the solvent contained in the treatment liquid 200 is not particularly limited, but may be, for example, 0.01 mass% to 100 mass%, or 40 mass% to 60 mass%, or 80 mass% to 100 mass%.
The treatment solution 200 may contain a catalyst. The catalyst is not particularly limited as long as it has an action of catalyzing the dissolution of the resin component in the fiber-reinforced resin material 100, but examples thereof include an acidic substance and a basic substance. These substances can enhance the solubility of the resin component in a solvent by adding a functional group such as a hydrogen ion or a hydroxide ion to the resin component or decomposing the resin component. In particular, in the case where the solvent contains a protic solvent, particularly, in the case where water is contained, the catalytic action of the acidic substance and the basic substance is further improved.
As the acidic substance, an inorganic acid, an organic acid, or a salt thereof, or a mixture thereof can be used. Examples of the inorganic acid include nitric acid, sulfuric acid, hydrochloric acid, and phosphoric acid, and one or two or more of them may be used singly or in combination. Examples of the phosphate include orthophosphate, metaphosphate, hypophosphite, phosphite, hypophosphite, pyrophosphates, trimetaphosphate, tetrametaphosphate, and pyrophosphite. Examples of the organic acid include formic acid, acetic acid, citric acid, succinic acid, and oxalic acid.
Examples of the salt of the inorganic acid or the organic acid include salts of alkali metals (for example, sodium, potassium, cesium, rubidium, etc.) and/or alkaline earth metals (for example, beryllium, magnesium, calcium, strontium, barium, etc.) of the above-mentioned inorganic acid or organic acid.
Among the above, inorganic acids, particularly nitric acid, sulfuric acid, hydrochloric acid and phosphoric acid, are easily available and contribute to promotion of dissolution of the resin component, and are preferred in this regard.
In the case where the acidic substance is contained in the treatment liquid 200 as a catalyst, the content of the acidic substance may be appropriately selected according to the type of the acidic substance to be used, the type of the solvent in the treatment liquid 200, and the resin component in the fiber-reinforced resin material 100 to be treated, but the content of the acidic substance in the treatment liquid 200 may be, for example, 0.01 mass% to 100 mass%, particularly 10 mass% to 50 mass%.
Examples of the alkaline substance include inorganic alkaline substances such as lithium, alkali metal, alkaline earth metal hydroxides, carbonates, hydrogencarbonates, sulfates, sulfites, and nitrates, and amine compounds such as dimethylamine and diethylamine, and one or two or more of them may be used singly or in combination. Examples of the alkali metal include sodium, potassium, cesium, rubidium, and the like. Examples of the alkaline earth metal include beryllium, magnesium, calcium, strontium, and barium.
Among the above, alkali metal hydroxides, carbonates and bicarbonates are readily available and contribute to promotion of dissolution of the resin component, and are preferred in this regard. More specifically, the alkaline substance preferably contains one or more selected from the group consisting of sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, potassium bicarbonate, and potassium carbonate.
In the case where the alkali substance is contained in the treatment liquid 200 as a catalyst, the content of the alkali substance may be appropriately selected according to the type of the alkali substance to be used, the type of the solvent in the treatment liquid 200, and the resin component in the fiber-reinforced resin material 100 to be treated, but the content of the alkali substance in the treatment liquid 200 may be, for example, 0.01 mass% to 100 mass%, particularly 10 mass% to 50 mass%.
(ii) Step (a)
First, as shown in fig. 3, the fiber-reinforced resin material 100 is put into the accommodating space 111 of the reaction tank 10. In the present embodiment, the fiber-reinforced resin material 100 is disposed between the pressing member 31 and the supporting member 35 of the fixing mechanism 30.
Next, the processing liquid 200 and the storage space 111 are filled from the filling port 23. The treatment liquid 200 may be injected into the storage space 111 in a unified manner, or the components constituting the treatment liquid 200 may be separately injected into the storage space 111. In addition, the fixing mechanism 30 may not fix the fiber-reinforced resin material 100 at the time of pouring the treatment liquid 200.
Next, the fiber-reinforced resin material 100 is treated with a treatment liquid. In this case, as shown in fig. 4, the fiber-reinforced resin material 100 is pressed and fixed by the pressing member 31 of the fixing mechanism 30, and the treatment by the treatment liquid 200 is performed.
The pressure of the pressing surface 311 when the fiber reinforced resin material 100 is pressed by the pressing member 31 is not particularly limited, and may be 8.5x10, for example -5 Pa is not less than 8.5Pa, preferably 8.5X10 Pa -4 Pa above 8.5 -1 Pa or below.
In the treatment with the treatment liquid 200, it is preferable that the pressing member 31 is reciprocated up and down to stir the treatment liquid 200. When the pressing member 31 is reciprocated, the supporting member 35 supported by the elastic member 37 reciprocates in conjunction with the reciprocating movement of the pressing member 31. Accordingly, even if the pressing member 31 is reciprocated, the fiber-reinforced resin material 100 is fixed between the pressing member 31 and the supporting member 35 of the fixing mechanism 30. This makes it possible to fix the fiber-reinforced resin material 100 and stir the treatment liquid 200.
Conventionally, a treatment liquid is stirred using a general stirring blade or the like, but in this case, there is a problem that reinforcing fibers exposed from a fiber-reinforced resin material are damaged by the stirring blade or reinforcing fibers are entangled with the stirring blade. Therefore, it has been difficult to collect the reinforcing fibers in a state where the shape and orientation of the reinforcing fibers are maintained. In contrast, in the present embodiment, the fiber-reinforced resin material 100 is fixed by the fixing mechanism 30 and stirred, so that the above-described problem can be suppressed, and the reinforcing fibers can be recovered while maintaining the shape and orientation of the reinforcing fibers.
The distance of movement of the pressing member 31 (single-pass distance) that is reciprocated when stirring the treatment liquid 200 by the fixing mechanism 30 is not particularly limited, but is, for example, 5mm to 1000mm, preferably 50mm to 300 mm.
The temperature of the treatment liquid 200 during the treatment is not particularly limited, and varies depending on the type of the treatment liquid 200, but is, for example, 30 to 300 ℃, preferably 50 to 100 ℃. The temperature of the treatment liquid 200 is adjusted by operating the temperature adjustment sleeve 13.
The time for the treatment with the treatment liquid 200 is not particularly limited, and may be 1 minute to 1440 minutes, preferably 10 minutes to 60 minutes, from the time when the target temperature is reached.
The treatment with the treatment solution 200 may be performed under normal pressure, under reduced pressure, or under increased pressure. When the treatment with the treatment liquid 200 is performed under pressure, the treatment can be performed under an atmosphere of, for example, 0.11MPa to 7.0MPa, particularly 0.11MPa to 2.0 MPa. In addition, when safety and economy are considered, it is preferable to perform the treatment with the treatment liquid 200 at normal pressure.
By the treatment with the treatment liquid 200, at least a part of the resin component is eluted from the fiber reinforced resin material 100 into the treatment liquid, and the reinforcing fiber can be recovered.
2.3 liquid removal step
As shown in fig. 5, after the treatment with the treatment liquid 200, the valve 17 is operated to open the liquid discharge port 15, and the treatment liquid 200 is discharged from the liquid discharge port 15.
In this case, it is preferable to press the fiber-reinforced resin material 100 by the pressing member 31 and press the fiber-reinforced resin material 100. This enables efficient liquid removal. Specifically, the pressing member 31 is moved downward, so that the support member 35 moved therewith is moved to a position where it abuts against the restricting member 39. Further, the fiber reinforced resin material 100 can be further subjected to deliquoring by pressing the pressing member 31 with an appropriate pressure.
2.4 cleaning procedure
Next, cleaning is performed as needed. The cleaning can be performed by bringing the cleaning liquid into contact with the fiber-reinforced resin material 100. Specifically, in the above-described dissolving step and the removing step, the treatment liquid 200 can be replaced with a cleaning liquid. However, the temperature and the cleaning time of the cleaning liquid at the time of cleaning may be appropriately set.
Here, at the time of cleaning, the fiber reinforced resin material 100 can be fixed by the fixing mechanism 30 and cleaned. Accordingly, the reinforcing fibers can be washed/recovered in a state in which the shape and orientation of the reinforcing fibers contained in the fiber-reinforced resin material 100 are maintained.
As the cleaning liquid, one kind or two or more kinds of the water and various organic solvents mentioned as the solvent of the above-mentioned treatment liquid 200 may be used singly or in combination.
In addition, the cleaning liquid may contain an acidic substance or a basic substance. The resin component and its reactant remaining in the fiber-reinforced resin material 100 can be removed by adjusting the liquid properties by these substances.
The above-described dissolving step, the removing step, and the cleaning step may be performed as many times as necessary. For example, the dissolving step and the removing step may be repeated a plurality of times, and then the washing step may be performed. For example, the liquid removal step may be performed after the dissolution step is performed a plurality of times, and the washing step may be performed a required number of times. Alternatively, for example, the dissolving step, the removing step, and the cleaning step may be performed in this order as many times as necessary.
2.5 drying Process
As described above, the fiber-reinforced resin material 100 may be dried in a state where the resin component is dissolved and removed from the fiber-reinforced resin material 100. For example, the drying can be performed by circulating the gas inside the housing space 111 of the reaction tank 10 by a gas supply mechanism, not shown. The gas to be circulated is not particularly limited, but is preferably an inert gas such as air or nitrogen in view of safety.
In addition, the fiber-reinforced resin material 100 may be heated during drying. Thereby, drying is promoted. The heating may be performed by, for example, the temperature adjusting jacket 13 or by introducing a heated gas into the reaction tank 10. The temperature of the gas at the time of heating is, for example, 0 ℃ to 400 ℃, preferably 80 ℃ to 110 ℃.
Here, the fiber-reinforced resin material 100 may be fixed by the fixing mechanism 30 and dried. Thereby, the reinforcing fibers contained in the fiber-reinforced resin material 100 can be dried while maintaining the shape and orientation of the reinforcing fibers.
2.6 recovery procedure
Through the above steps, the reinforcing fibers are recovered from the fiber-reinforced resin material 100, and the regenerated reinforcing fibers are obtained. As shown in fig. 6, in this step, the regenerated reinforcing fibers can be easily taken out by tilting the opening 115 of the reaction tank 10 downward with the rotation axis 43 of the support table 40 as a starting point.
Thereby, a regenerated reinforcing fiber can be obtained. In the method for producing regenerated reinforcing fibers according to the present embodiment, the fiber-reinforced resin material 100 is pressed and fixed by the fixing mechanism 30, and the resin component in the fiber-reinforced resin material 100 is dissolved in the treatment liquid 200 containing the solvent. Thus, when the fiber-reinforced resin material 100 is treated with the treatment liquid 200 containing a solvent, the shape of the reinforcing fibers in the fiber-reinforced resin material 100 becomes difficult to deform. In particular, even after the resin component in the fiber-reinforced resin material 100 is dissolved and the reinforcing fibers are exposed during the treatment, the reinforcing fibers are fixed, and therefore, the reinforcing fibers are not easily entangled. In this way, the shape and fiber direction of the obtained regenerated reinforcing fibers can be maintained, for example, the fiber direction of the obtained regenerated reinforcing fibers can be maintained in one direction, and the physical properties, such as physical strength, of the fiber-reinforced resin material produced using the regenerated reinforcing fibers can be improved.
In addition, since the reinforcing fibers are less likely to be entangled with each other after the resin component in the fiber-reinforced resin material 100 is dissolved and the reinforcing fiber bundles are exposed during the treatment, the treatment liquid can uniformly infiltrate the reinforcing fibers in the fiber-reinforced resin material 100, and the dissolution reaction of the resin component can be uniformly performed.
In the method of the present embodiment, the fiber-reinforced resin material can be pressed and fixed by the fixing mechanism 30, and the reaction can be performed. Accordingly, a wide variety of fiber reinforced resin materials 100 can be handled regardless of size and shape. For example, the fiber-reinforced resin material and the large prepreg sheet which are cut into a very small size are also treated, and the regenerated reinforcing fibers can be recovered.
3. Modification examples
Next, several modifications of the above-described embodiment of the present invention will be described. Hereinafter, differences from the above-described embodiments will be mainly described, and the description of the same matters will be omitted.
In the above embodiment, the support member 35 is disposed so as to be supported by the elastic member 37, but the present invention is not limited to this, and for example, the support member 35 may be omitted as in the reaction apparatus 1A for reinforcing fiber recovery shown in fig. 7. In this case, the bottom 113 of the reaction vessel body 11 functions as a supporting member, and the pressing member 31, the control member 33, and the bottom 113 constitute the fixing mechanism 30A.
In the above embodiment, the fixing mechanism 30 is configured to press and fix the fiber reinforced resin material 100 from the up-down direction by the pressing member 31 and the supporting member 35, but the present invention is not limited to this, and the fixing mechanism may press and fix the fiber reinforced resin material in any direction. For example, the pressing member and the support member may be arranged to press/fix the fiber reinforced resin material in the horizontal direction.
In the above embodiment, the pressing member 31 and the support member 35 are formed in a plate shape, but the present invention is not limited to this. For example, a hole may be provided in the pressing member and the support member. This reduces the fluid resistance during stirring. Alternatively, the pressing member and the supporting member may be a mesh-like sheet.
In the above embodiment, the treatment liquid 200 is stirred by vertically moving the pressing member 31 and the supporting member 35, but the present invention is not limited to this. For example, a stirring device may be provided at a portion of the reaction tank which is not in contact with the fiber-reinforced resin material. Alternatively, the position of the fixing mechanism may be fixed, and the stirring may be performed by moving the reaction vessel. The movement mode of the reaction vessel is not particularly limited, and may be, for example, a reciprocating movement or a rotating movement in a vertical direction and/or a horizontal direction.
For example, in the above embodiment, the case where the elastic member 37 is a compression coil spring has been described, but the present invention is not limited to this, and the elastic member may be constituted by any elastic member. Examples of such elastic members include leaf springs such as laminated leaf springs and thin plate springs, torsion springs, bamboo springs, rubber, and polymer elastomers such as elastomers.
For example, in the above embodiment, the reaction vessel 10 and the reaction vessel body 11 are described as being cylindrical, but the present invention is not limited thereto. For example, the shape of the reaction vessel body 11 may be changed so that the accommodation space is substantially rectangular.
For example, in the method for producing a regenerated reinforcing fiber according to the above embodiment, an example was described in which the reaction device for reinforcing fiber recovery according to the present embodiment was used, but the present invention is not limited to this, and the method for producing a regenerated reinforcing fiber according to the present invention may not use the reaction device for reinforcing fiber recovery according to the present invention.
The preferred embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to these examples. It is obvious that various modifications and modifications are conceivable within the scope of the technical idea described in the claims, and these modifications are naturally understood to be within the technical scope of the present invention, as long as they are a person having ordinary knowledge in the technical field to which the present invention belongs.
Description of the reference numerals
1: reaction device for reinforcing fiber recovery
10: reaction tank
11: reaction tank body
13: temperature adjusting sleeve
15: liquid outlet
17: valve
19: flange
20: cover for a container
21: cover body
23: liquid filling port
25: exhaust port
27: flange
30: fixing mechanism
31: pressing member
33: control part
35: support member
37: elastic component
39: limiting component
40: supporting table
41: supporting table body
43: rotary shaft
100: fiber-reinforced resin material
200: treatment liquid
Claims (14)
1. A reaction device for reinforcing fiber recovery, which is used for recovering reinforcing fibers from a fiber reinforced resin material by a solvent method, comprises:
a reaction tank for accommodating the fiber reinforced resin material and the solvent; and
the fixing mechanism comprises a pressing component capable of pressing the fiber reinforced resin material, and the fiber reinforced resin material accommodated in the fixing mechanism can be fixed by pressing the pressing component.
2. The reaction device for reinforcing fiber recovery according to claim 1, wherein,
the pressing member has a plate shape.
3. The reaction device for reinforcing fiber recovery according to claim 1 or 2, wherein,
the pressing member has a pressing surface that presses the fiber reinforced resin material, and is capable of reciprocating in a direction perpendicular to the pressing surface.
4. The reaction device for reinforcing fiber recovery according to any one of claims 1 to 3, wherein,
the fixing mechanism has a support member that supports the fiber-reinforced resin material from a side opposite to the pressing member.
5. The reaction device for reinforcing fiber recovery according to claim 4, wherein,
the support member has a plate shape.
6. The reaction device for reinforcing fiber recovery according to claim 4 or 5, wherein,
the support member is capable of reciprocating in a direction toward the pressing member.
7. The reaction device for reinforcing fiber recovery according to any one of claims 4 to 6, wherein,
further has an elastic member for supporting the supporting member.
8. The reaction device for reinforcing fiber recovery according to claim 7, wherein,
the elastic member is a compression coil spring.
9. The reaction device for reinforcing fiber recovery according to any one of claims 4 to 8, wherein,
further has a restriction member that restricts the movement position of the support member.
10. The reaction device for reinforcing fiber recovery according to any one of claims 1 to 9, wherein,
the reaction tank has an opening for inputting the fiber-reinforced resin material, and is configured to be tiltable so that the opening is tilted downward.
11. The reaction device for reinforcing fiber recovery according to any one of claims 1 to 10, wherein,
the reinforcing fiber is carbon fiber.
12. A method for producing a regenerated reinforcing fiber, wherein,
a process for treating a fiber-reinforced resin material comprising reinforcing fibers and a resin component with a treatment liquid comprising a solvent, and dissolving at least a part of the resin component in the treatment liquid, wherein the reaction device for reinforcing fiber recovery is used according to any one of claims 1 to 11,
in the step, the fiber-reinforced resin material is treated with the treatment liquid in a state of being fixed by the fixing means.
13. A method for producing a regenerated reinforcing fiber, wherein,
comprises a step of treating a fiber-reinforced resin material comprising reinforcing fibers and a resin component with a treatment liquid comprising a solvent, and dissolving at least a part of the resin component in the treatment liquid,
in the step, the fiber-reinforced resin material is treated with the treatment liquid in a state of being pressed and fixed.
14. The method for producing a regenerated reinforcing fiber according to claim 12 or 13, wherein,
In the step, the solvent is stirred while the fiber-reinforced resin material is fixed.
Applications Claiming Priority (3)
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| JP2020-200195 | 2020-12-02 | ||
| JP2020200195 | 2020-12-02 | ||
| PCT/JP2021/043454 WO2022118756A1 (en) | 2020-12-02 | 2021-11-26 | Reactor device for recovering reinforcing fibers and production method for recycled reinforcing fibers |
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| Publication Number | Publication Date |
|---|---|
| CN116648314A true CN116648314A (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202180079668.8A Pending CN116648314A (en) | 2020-12-02 | 2021-11-26 | Reaction device for reinforcing fiber recovery and method for producing regenerated reinforcing fiber |
Country Status (6)
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| US (1) | US20240025084A1 (en) |
| EP (1) | EP4257254A4 (en) |
| JP (1) | JP7222154B2 (en) |
| KR (1) | KR20230107389A (en) |
| CN (1) | CN116648314A (en) |
| WO (1) | WO2022118756A1 (en) |
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| WO2024062960A1 (en) * | 2022-09-21 | 2024-03-28 | 株式会社イノアックコーポレーション | Polyurethane foam decomposition device and polyurethane foam decomposition method |
| CN116274258B (en) * | 2023-05-12 | 2024-04-19 | 江苏苏洁环卫装备有限公司 | Spray type garbage deodorizing equipment for garbage room |
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| US4249562A (en) * | 1978-11-06 | 1981-02-10 | King Lloyd H Sr | Inline dispersal valve |
| JP3230196B2 (en) * | 1993-07-15 | 2001-11-19 | 弘次 青木 | Resin waste treatment equipment |
| CA2105142C (en) * | 1993-08-30 | 2001-03-13 | Shigetomi Komatsu | Method of recovering polystyrene waste materials and its apparatus for dissolving polystyrene waste materials |
| JP2001040134A (en) * | 1999-07-28 | 2001-02-13 | Bio Venture Bank Kk | Apparatus for reducing volume of expanded polystyrene |
| JP2001240697A (en) * | 2000-02-29 | 2001-09-04 | Sanesu:Kk | Method for collecting carbon fiber from carbon fiber- reinforced plastic by solvent catalyst method |
| JP3072696U (en) * | 2000-04-20 | 2000-10-24 | 株式会社阿部鉄工所 | Styrofoam dissolution / recovery equipment |
| JP4595847B2 (en) * | 2006-03-17 | 2010-12-08 | 日立化成工業株式会社 | Method for separating and collecting fibers and fillers contained in fiber reinforced plastic |
| JP5347056B2 (en) * | 2011-08-30 | 2013-11-20 | カーボンファイバーリサイクル工業株式会社 | Regenerated carbon fiber production apparatus and regenerated carbon fiber production method |
| JP5816898B2 (en) * | 2012-03-28 | 2015-11-18 | 国立大学法人静岡大学 | Recycled fiber manufacturing method and recycled fiber manufacturing system |
| EP2906924B1 (en) * | 2012-10-09 | 2020-10-28 | Waters Technologies Corporation | Apparatus and method for analyte extraction |
| DE102013200482A1 (en) * | 2013-01-15 | 2014-07-17 | Siemens Aktiengesellschaft | Process for recovering reinforcing fibers from fiber-reinforced plastics |
| US20170081785A1 (en) * | 2015-09-22 | 2017-03-23 | Caterpillar Inc. | Carbon fiber reclamation from composite materials |
| WO2017052229A1 (en) * | 2015-09-23 | 2017-03-30 | 롯데케미칼 주식회사 | Method for recycling prepreg |
| KR101801788B1 (en) * | 2015-12-11 | 2017-11-28 | 한국과학기술연구원 | Method and apparatus for recovering fiber assembly from thermosetting resin composite materials and recovered fiber assembly |
| JP6694862B2 (en) * | 2017-11-09 | 2020-05-20 | 三菱重工業株式会社 | Reinforcing fiber regeneration method |
| JP7148109B2 (en) * | 2018-04-18 | 2022-10-05 | 株式会社ジンテク | Method for processing laminated chip-like or plate-like plastic composites |
| JP2020011482A (en) | 2018-07-20 | 2020-01-23 | 日立化成株式会社 | Method for producing recycled material, method for treating composite material, and carbon fiber |
| US11167451B2 (en) * | 2018-08-03 | 2021-11-09 | The Boeing Company | Lewis base-mediated recovery of fibers from fiber reinforced polymers |
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- 2021-11-26 JP JP2022566889A patent/JP7222154B2/en active Active
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- 2021-11-26 WO PCT/JP2021/043454 patent/WO2022118756A1/en active Application Filing
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| JP7222154B2 (en) | 2023-02-14 |
| EP4257254A4 (en) | 2024-06-19 |
| US20240025084A1 (en) | 2024-01-25 |
| KR20230107389A (en) | 2023-07-14 |
| JPWO2022118756A1 (en) | 2022-06-09 |
| EP4257254A1 (en) | 2023-10-11 |
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